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US 6,969,461 B2Granted
Combination particulate and acid-neutralizing filter
AssigneesBaldwin Filters, Inc., D-A Lubricant Company, Inc.
InventorsJohn H. Beard, Allan Roush
Life of this patent
Estimating the term…
Abstract
The present invention provides a filter apparatus for use in removing impurities and acids contained in a fluid that includes a particulate filter and an acid-neutralizing filter. Preferably, the particulate filter and the acid-neutralizing filter are positioned within a housing. A conduit having a pressure reduction section is arranged to create a pressure differential across the acid-neutralizing filter such that a portion of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter.
Claims36
A filter apparatus for use in removing acids and impurities contained in a fluid comprising:
- a housing having an inlet and an outlet;
- a first particulate filter contained in the housing;
- an acid-neutralizing filter contained in the housing, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound, said acid-neutralizing filter being arranged in fluidic parallel with the first particulate filter, and a second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the acid-neutralizing compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
- and
- a conduit contained in the housing, the conduit including a pressure reduction section;
- wherein the pressure reduction section is arranged to create a pressure differential across the acid-neutralizing filter such that a portion of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter.
3 more elements
A filter apparatus for use in removing impurities and acids contained in a fluid by filtration comprising:
- a housing having an inlet and an outlet;
- a particulate filter;
- an acid-neutralizing filter in fluidic parallel with the first particulate filter, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound and a second particulate filter, the second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
- and
- a conduit which includes a pressure reduction section in the form of a venturi, the conduit including at least one passageway through a wall of the conduit at the venturi;
- whereby the filter apparatus is arranged such that:
- a. the fluid to be filtered by the filter apparatus flows into the housing;
- b. less than 100% of the fluid entering the housing passes through the particulate filter;
- c. wherein the fluid entering the apparatus and not passing through the particulate filter is drawn through the acid-neutralizing filter;
- and
- d. wherein the fluid drawn through the acid-neutralizing filter flows into the conduit and mixes with the fluid filtered by the particulate filter.
8 more elements
A filter apparatus for use in removing acids and impurities contained in a fluid by filtration comprising:
- a housing having an inlet and an outlet;
- a first particulate filter contained in the housing, the housing and the particulate filter arranged such that from about 90% to about 97% of the fluid to be filtered by the filter apparatus passes through the first particulate fitter;
- an acid-neutralizing filter arranged in fluidic parallel with the first particulate filter such that about 3% to about 10% of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound, and a second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet;
- and
- a base plate comprising a threaded central passage and one or more ports.
2 more elements
A filter apparatus for use in removing acid and impurities contained in a fluid comprising;
- a housing having an inlet and an outlet;
- an acid-neutralizing bed contained in the housing comprising a media container having an imperforate outer side wall surrounding acid-neutralizing media particles;
- a first flow path for fluid running through the housing from the inlet to the outlet, the first flow path running through the acid-neutralizing bed and then through a first particulate filter downstream of the acid-neutralizing bed such that acid-neutralizing media particles are prevented from reaching the outlet when fluid flows from along the first flow path from the inlet to the outlet;
- and
- a second flow path for fluid running through the housing from the inlet to the outlet, the second flow path running through a second particulate filter and bypassing the acid-neutralizing bed.
2 more elements
A filter apparatus for use in removing acids and impurities contained in a fluid comprising:
- a housing having an inlet and an outlet;
- an acid-neutralizing bed contained in the housing comprising a media container having an imperforate outer side wall surrounding acid-neutralizing media particles;
- a first flow path for fluid running through the housing from the inlet to the outlet through the acid-neutralizing bed;
- a particulate filter downstream of the acid-neutralizing bed fluidically between the acid-neutralizing bed and the outlet such that acid-neutralizing media particles are prevented from reaching the outlet when fluid flows from along the first flow path from the inlet to the outlet:
- and
- a second flow path for fluid running through the housing from the inlet to the outlet bypassing the acid-neutralizing bed.
3 more elements
Dependencies are inferred from the claim text.